https://bugzilla.kernel.org/show_bug.cgi?id=201753 --- Comment #21 from David Coe (david.coe@xxxxxxxxxx) --- Good morning, Suravee! One (final?!) test of your patch (with increased retry count and logging) on the latest git kernel (5.10.0-rc2) all on Ryzen 2400G. In summary: 5.8.0-44 (Ubuntu 20.10) 6 trys 20 msecs 5.10.0-14 (Ubuntu 21.04) 5 trys 20 msecs 5.12.0-rc2 (raw git) 6 trys 20 msecs AFAIK you are AMD's go-to guru for open-source people and an IOMMU expert. It's your patch that is now both in the kernel commit and (I hope) in Ubuntu's to-do list. Could I ask if you could patch-the-patch (if there is no esoteric technical downside) to increase the number of retrys? Maybe if Paul would give it another shot with his Ryzen 2200G with a larger maximum count and his logging :-). Best regards and our thanks David -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.